Integrated Circuits

74147
10-to-4 line priority encoder
PDF datasheet
       
A 3 1  • 16 Vcc
A 4 2 15 NC
A 5 3 14 Y 3
A 6 4 13 A 2
A 7 5 12 A 1
Y 2 6 11 A 0
Y 1 7 10 A 8
GND 8 9 Y 0
       
Pin Symbol Description
1 A 3 decimal data input (active low)
2 A 4 decimal data input (active low)
3 A 5 decimal data input (active low)
4 A 6 decimal data input (active low)
5 A 7 decimal data input (active low)
6 Y 2 BCD address output (active low)
7 Y 1 BCD address output (active low)
8 GND ground
9 Y 0 BCD address output (active low)
10 A 8 decimal data input (active low)
11 A 0 decimal data input (active low)
12 A 1 decimal data input (active low)
13 A 2 decimal data input (active low)
14 Y 3 BCD address output (active low)
15 NC no connection
16 Vcc supply voltage


Specifications
(typical values under recommended operating conditions, unless specified)
Parameter Value Unit
Propagation delay, A n to Y n 15 (74HC)
17 (74HCT) 		ns

Notes
  • When two or more inputs are simultaneously active, the input with the highest priority is represented on the output.
  • A 8 has the highest priority.
  • When all nine data inputs are high, all four outputs are high. (BCD zero)

Note
Data is maintained by an independent source and accuracy is not guaranteed. Check with the manufacturer's datasheet for up-to-date information.

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